.block-item {
  border: 1px solid red;
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
  margin-right: 20px;
}
.block-box {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}